PMC21 datasheet(28/48 Pages) EH

28 / 48 page

Cerabar PMC11, PMC21, PMP11, PMP21

Endress+Hauser

Pressure specifications

LWARNING

The maximum pressure for the measuring device depends on the lowest-rated element with

regard to pressure.

‣ For pressure specifications, see the "Measuring range" section and the "Mechanical construction"

section.

‣ The Pressure Equipment Directive (2014/68/EU) uses the abbreviation "PS". The abbreviation "PS"

corresponds to the MWP (maximum working pressure) of the measuring device.

‣ MWP (maximum working pressure): The MWP (maximum working pressure) is specified on the

nameplate. This value is based on a reference temperature of +20 °C (+68 °F) and may be applied

to the device for an unlimited period of time. Observe the temperature dependency of the MWP.

‣ OPL (over pressure limit): The test pressure corresponds to the over pressure limit of the sensor

and may only be applied temporarily to ensure that the measurement is within the specifications

and no permanent damage develops. In the case of sensor range and process connections where

the over pressure limit (OPL) of the process connection is smaller than the nominal value of the

sensor, the device is set at the factory, at the very maximum, to the OPL value of the process

connection. If you want to use the entire sensor range, select a process connection with a higher

OPL value.

‣ Oxygen applications: In oxygen applications, the values for "pmax and Tmax for oxygen applications

may not be exceeded .

‣ Devices with ceramic process isolating diaphragm: avoid steam hammering! Steam hammering

can cause zero point drifts. Recommendation: Residue (water droplets or condensation) may

remain on the process isolating diaphragm following CIP cleaning and can result in local steam

hammering the next time steam cleaning takes place. In practice, drying the process isolating

diaphragm (e.g. by blowing) has proved to prevent steam hammering.

PMC21 Datasheet(PDF) 28 Page - Endress+Hauser Group Services AG